commit d1617b567ff6bc669d71e367d22e0e93ff7e2e24
author Tim Zhang <tim@hyper.sh> Tue May 25 11:40:54 2021 +0800
committer Thomas de Zeeuw <thomasdezeeuw@gmail.com> Fri Jun 11 09:55:53 2021 +0000
tree 2b9cccff278644025084da4b8f7b34f9af471816
parent 772c692150c711d7bdd72b5c6287072b8914e519

Set FD_CLOEXEC for duped epoll_fd

The close-on-exec flag (FD_CLOEXEC; see fcntl(2)) for the duplicate descriptor is off
and we should set it manually.

Fixes: tokio-rs/tokio#3809

Signed-off-by: Tim Zhang <tim@hyper.sh>

src/sys/unix/selector/epoll.rs

diff --git a/src/sys/unix/selector/epoll.rs b/src/sys/unix/selector/epoll.rs
index 76ee7f9..997a54b 100644
--- a/src/sys/unix/selector/epoll.rs
+++ b/src/sys/unix/selector/epoll.rs
@@ -41,7 +41,7 @@
     }
 
     pub fn try_clone(&self) -> io::Result<Selector> {
-        syscall!(dup(self.ep)).map(|ep| Selector {
+        syscall!(fcntl(self.ep, libc::F_DUPFD_CLOEXEC)).map(|ep| Selector {
             // It's the same selector, so we use the same id.
             #[cfg(debug_assertions)]
             id: self.id,